Multiscale carbon fiber‐graphene oxide reinforcements for silicone resin composites with simultaneously enhanced interfacial strength and antihydrothermal aging behaviors

Abstract

Multiscale carbon fiber/graphene oxide (CF/GO) reinforcements were developed by chemically grafting GO onto the CF surface using tetraethylenepentamine (TEPA) as a bridging agent for methylphenylsilicone resin composites. Chemical structures and surface morphologies of CFs were systematically characterized. GO was uniformly grafted onto the surface of CFs by the formation of chemical bonding between CFs and GO. TEPA and GO grafting could enhance wettability, surface roughness and free energy significantly. The obtained hierarchical reinforcement (CF‐TEPA‐GO) composites offered 48.49 and 31.53% improvements in the interlaminar shear strength (ILSS) and impact toughness, respectively. Moreover, ILSS of CF‐TEPA‐GO composites after hydrothermal aging treatment was 37.65 MPa with a decrease of just 13.96% compared with that of Untreated CF composites (20.52 MPa) with an obvious decrease of 30.37%. Our design technique, starting from facile chemistry and inexpensive materials, can offer a versatile and effective strategy of preparing hierarchical reinforcements for high‐performance composites applications. POLYM. COMPOS., 39:3509–3518, 2018. © 2017 Society of Plastics Engineers

Effectof epoxy functionalized elastomer modified carbon fiber on mechanical properties and interfacial adhesion of chloroprene rubber (CR)/natural rubber (NR) composites

“…This is because concentrated hydrochloric acid can oxidize and etch the surface of carbon fiber thereby increasing the O and N content 31 . After modification with KH550, Si elements appeared on the surface of CF and the content of N elements increased, which indicated that KH550 react with oxygen‐containing groups and successfully grafted the introduction of amino groups on the surface of CF 32,33 . In the curve of Figure 2, the peak of N increases again and the Si peak appears.…”

“…31 After modification with KH550, Si elements appeared on the surface of CF and the content of N elements increased, which indicated that KH550 react with oxygencontaining groups and successfully grafted the introduction of amino groups on the surface of CF. 32,33 In the curve of Figure 2, the peak of N increases again and the Si peak appears. After modification by EVMG, the Si and N were reduced, this is because after KH550 modification, KH550 molecules accumulate on the surface and the outermost part of KH550 molecules in the fiber dissolves in the DMF solution.…”

The preparation of rigid hybrid silicone resins by combining carbon nanomaterial loading nanoparticles

“…Carbon nanomaterials, such as carbon nanotubes (CNTs) and graphene, had extensive application in the field of materials [13] on account of the nanotubes' modulus (1 TPa) and tensile strengths (150 GPa), [14][15][16][17] excellent chemical and physical properties of the thinnest material (graphene). [13,18,19] The rigid aromatic heterocyclic ring was a constitutional unit in polymer chain to obtain the high strength and high modulus materials .…”